knuckle ball Knox system • knuckle bow · · · Info · Definitions · Synonyms · Characters · · knuckle ball · · Text Common · · Latin · · Scripts 12 · · Length Definitions · · · (noun) a baseball pitch thrown with little speed or spin. Synonyms: knuckleball, knuckler. · · Noun Definition 1 Synonyms · · · knuckle · · Synonym 1 knuckle joint · · Synonym 2 metacarpophalangeal joint · · Synonym 3 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 k latin small letter k U+006B l latin small letter l U+006C n latin small letter n U+006E u latin small letter u U+0075